Turncoat Kunoichi is a rare Creature — Mutant Ninja Fox card from Teenage Mutant Ninja Turtles (TMT), collector number 260. Current market price: $1.08 (foil $1.07), TCGplayer market prices via Scryfall.
Sneak {2}{W}{B} (You may cast this spell for {2}{W}{B} if you also return an unblocked attacker you control to hand during the declare blockers step. It enters tapped and attacking.) When this creature enters, choose target creature an opponent controls. Exile that creature until this creature leaves the battlefield. If this creature's sneak cost was paid, instead exile the chosen creature.